JP2007128816A - Wire connection sleeve and wire connection method using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable to secure enough tensile strength for cable connection without using a special tool for compression, with connection work simply and quickly done, electric connection surely made, and without any strand breakage. <P>SOLUTION: The sleeve is provided with a spacer 4 put through a part of a conductor-exposed part 3 of each of a plurality of wires 1 with a coating 2 peeled off, and a sleeve main body 10 equipped with an insertion hole 11 into which each conductor-exposed part 3 with the spacer 4 put through is inserted. A plurality of pressing members 12 are screwed down on a periphery face of the sleeve main body 10, inside which 10, a tip part of each pressing member 12 is made protruded to a position in contact with the conductor-exposed part 3 and the spacer 4. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electric wire connecting sleeve for connecting a plurality of electric wires and an electric wire connecting method using the same.

  Conventionally, when connecting a plurality of electric wires, there are cases where a compression tool is used and cases where it is not used. First, in the former case, the covering of each electric wire to be connected is peeled off to expose the conductor exposed portion, and the conductor exposed portion of each electric wire is opposed so that the end surface of each conductor exposed portion faces inside the sleeve. The sleeve is inserted from the insertion holes on both sides, and both ends of the sleeve are compressed from the outside with a compression tool to ensure the electrical connection of each wire without damaging the strands and to ensure the tensile strength. Yes. However, since the compression tool is large in weight and size, in addition to requiring a lot of labor for transporting the compression tool, there is a problem that the difficulty of connection work depends on the situation such as the scaffolding at the site. is there.

On the other hand, in the latter case, for example, a wire connecting sleeve comprising a sleeve main body into which conductor exposed portions of a plurality of wires peeled off are inserted, and a plurality of bolts screwed along the axial direction of the sleeve main body The end of the bolt is protruded inside the sleeve body, and the exposed portion of the conductor of the electric wire is compressed by the protruding portion to ensure each of the required conditions as described above. (See Patent Document 1).
JP 2000-287346 A

  However, since the wire connecting sleeve of the above publication only compresses the conductor exposed portion of the wire locally by the tip of the bolt, when the bolt tightening torque is small, when the tensile load on the wire is applied There is a problem that the electric wire inserted into the sleeve body may come off. Further, when the tightening torque of the bolt is increased, there is a problem that the strands of the conductor exposed portion are damaged and the strands are broken.

  Therefore, in view of the above problems, the present invention can perform the connection work easily and quickly without using a compression tool, and can reliably perform electrical connection, and can also ensure sufficient tensile strength. An object of the present invention is to provide a sleeve and a method of connecting an electric wire using the sleeve.

  In order to solve the above-mentioned problems, the wire connection sleeve according to the present invention includes a spacer 4 inserted into a part of the conductor exposed portion 3 of the electric wire 1 from which the coating 2 is peeled, and each conductor through which the spacer 4 is inserted. A sleeve main body 10 having an insertion hole 11 into which the exposed portion 3 is inserted. A plurality of presser members 12 are screwed onto the peripheral surface of the sleeve main body 10, and each presser is placed inside the sleeve main body 10. The tip end of the member 12 protrudes to a position where it abuts against the conductor exposed portion 3 and the spacer 4.

  Accordingly, the plurality of presser members 12 screwed into the circumferential surface of the sleeve body 10 are screwed in the radially inward direction of the sleeve body 10, and thus are positioned substantially concentrically with respect to the inner circumferential surface of the sleeve body 10. The conductor exposed portion 3 is deformed so as to be dented by the local compression in the radially inward direction of the presser member 12 so that the other portion is pushed outward, and this pushed-up portion is the inner periphery of the sleeve body 10. It is in pressure contact with the surface and slightly larger than the inner diameter of the spacer 4. That is, the expanded portion serves as a stopper for the exposed conductor 3.

  On the other hand, the spacer 4 has a diameter larger than that of the conductor exposed portion 3 and is thin, so that the spacer 4 is easily compressed and easily deformed, so that both the inner peripheral surface of the sleeve main body 10 and the outer peripheral surface of the conductor exposed portion 3 are. The contact areas of the presser members 12 are slightly larger than the contact areas of the presser members 12.

  That is, a compression region is formed in the conductor exposed portion 3 by direct local compression by the plurality of pressing members 12 and indirect local compression through the spacer 4, and in accordance with this compression region. The conductor exposed portion 3 is deformed, and a good electrical connection state can be secured, and the tensile strength can be secured.

  In addition, the conductor exposed part 3 here includes both a single wire and a stranded wire.

  The spacer 4 is preferably positioned on the base end side of the conductor exposed portion 3.

  This is because, for example, when the spacer 4 is compressed on the distal end side of the conductor exposed portion 3, the proximal end portion of the conductor exposed portion 3 is locally compressed by the pressing member 12, so that the tensile strength of the proximal end portion is It is considered that the contact area is reduced in both the sleeve main body 10 and the spacer 4 and the spacer 4 and the conductor exposed portion 3 due to the deformation of the spacer 4 when the spacer 4 is compressed on the base end side of the conductor exposed portion 3. This is because the base end portion side of the conductor exposed portion 3 is substantially fixed and no tensile load is applied to the distal end portion side of the conductor exposed portion 3.

  Furthermore, the insertion hole 11 of the sleeve main body 10 may be formed eccentrically with respect to the center of the sleeve main body 10 so that the distance until the tip of the pressing member 12 contacts the spacer 4 and the conductor exposed portion 3 can be increased. preferable.

  In this case, the distance from the position in contact with the outer surface of the conductor exposed portion 3 to the tightening limit position (the position at which the head of the pressing member 12 is broken by tightening) becomes longer, and the conductor exposed portion 3 and the spacer 4 are correspondingly increased. Thus, a compressive force is applied, and the contact area between the holding member 12 itself and the conductor exposed portion 3 and the contact area between the conductor exposed portion 3 via the spacer 4 are increased. That is, the conductor exposed portion 3 and the spacer 4 are greatly deformed, further improving the electrical conductivity, and securing the tensile strength.

  In addition, the electric wire connection method of the present invention uses the above electric wire connection sleeves to connect electric wires.

  As described above, according to the present invention, it is not necessary to transport and construct the compression tool as in the prior art, and after inserting the exposed conductor portion of each electric wire through which the spacer is inserted into the sleeve body, It is only necessary to tighten the presser member provided on the peripheral surface, and sufficient electrical connection and tensile strength can be ensured, and there is an effect that the connection work can be performed easily and quickly without being influenced by the work environment at the site.

  Hereinafter, an electric wire connection sleeve and an electric wire connection method using the same according to an embodiment of the present invention will be described with reference to the accompanying drawings.

  As shown in FIGS. 1 and 2, the wire connection sleeve of the present embodiment has a cylindrical spacer 4 inserted into the conductor exposed portion 3 of the electric wire 1 from which the coating 2 has been peeled off, and the spacers 4 are inserted into both sides thereof. The sleeve main body 10 has an insertion hole 11 into which the exposed conductor exposed portion 3 is inserted, and a plurality of pressing members 12 made of bolts screwed into the peripheral surface of the sleeve main body 10 in the axial direction. .

  Inside the sleeve body 10, the spacer 4 is positioned on the base end side of the conductor exposed portion 3, and the distal end portion of each pressing member 12 aligned in a row protrudes to a position where it contacts the conductor exposed portion 3 and the spacer 4. . Further, the center of the insertion hole of the sleeve main body 10 is eccentric with respect to the center of the sleeve main body 10 so that the distance until the tip of the pressing member 12 contacts the conductor exposed portion 3 and the spacer 4 can be increased (see FIG. Lower side when viewed from 2).

  When each presser member 12 is tightened until its head is threaded, the tip of the conductor exposed portion 3 is compressed at the tip of each presser member 12, and the spacer 4 is compressed. At the distal end portion of the exposed portion 3, the deformed portion of the conductor exposed portion 3 is in surface contact with the inner peripheral surface of the sleeve main body 10, and at the proximal end portion of the conductor exposed portion 3, the outer peripheral surface of the deformed portion of the spacer 4 and the sleeve While the inner peripheral surface of the main body 10 is in surface contact, the outer peripheral surface of the deformed portion of the conductor exposed portion 3 and the inner peripheral surface of the deformed portion of the spacer 4 are in surface contact. As a result, the electrical connection state of each electric wire 1 to be connected is ensured and sufficient tensile strength can be secured.

  Next, examples will be described. Sleeve body 10 having a length dimension of 236.0 mm, a diameter dimension of 26.0 mm, and an insertion hole diameter dimension of 7.0 mm, a length dimension of 320.0 mm, a diameter dimension of 32.0 mm, and an insertion hole diameter dimension For the sleeve body 10 of 10.5 mm, an electrical resistance test and a tensile load test are respectively performed. Three wires 1 are prepared as samples, based on the standard value (standard value) of each sample, the measured value, the average value of the measured value of each sample, and the ratio of the measured value to the standard value (standard value). Make a decision.

  In addition, about an electrical resistance test, it carries out by the voltage drop method or the bridge method about the sleeve main body 10 which the connection of each electric wire 1 was completed. In this case, the electrical resistance value must be equal to or less than the measured resistance value of the electric wire 1 having the same length as the sample. In the electric wire 1 led out from both ends of the sleeve body 10, a position 500 mm away from both ends of the sleeve body 10 is taken as a measurement point.

  As shown in Tables 1 and 2, since the measured resistance values of Samples 1 to 3 were lower than the standard resistance value, a verification result that a good electrical connection state was ensured was obtained.

  Further, the tensile load test is performed on the sleeve body 10 whose electric resistance is measured. The tensile load is applied to each conductor exposed portion 3 on average, and is appropriately increased to 75 percent of the tensile load value, and thereafter increased at a speed of about 11 mm / min. In this case, it is a condition that the electric wire 1 should not slip or break at 95% or less of the tensile load value.

  As shown in Tables 3 and 4, when any measured value of each sample 1 to 3 exceeds the standard value, the conductor exposed portion 3 is broken, and the tensile strength can be sufficiently secured. The verification result was obtained.

  Next, modifications of the wire connection sleeve of the present invention will be described below. First, the wire connection sleeve of FIG. 3 includes a prismatic connection conductor 15 and sleeve bodies 16 disposed at both ends of the connection conductor 15. The sleeve body 16 can be attached by bolts and nuts, and an insertion hole 17 into which the conductor exposed portion 3 and the wedge 18 can be inserted is formed. The insertion hole 17 has a substantially trapezoidal cross section, and the insertion side of the conductor exposed portion 3 has a small diameter. And in the state which the conductor exposure part 3 was located in the lower side, the front-end | tip part of the wedge 17 is press-fitted from the opposite side to the insertion direction of the electric wire 1. FIG. Reference numerals 19a and 19b in the figure denote a locking pin for fixing to the end of the wedge 18 and a nut screwed to the locking pin.

  The wire connection sleeve of FIG. 4 is a so-called pantograph sleeve body 23 that includes a prismatic connection conductor 20 and pressing plates 22 that are connected to both sides of the connection conductor 20 by a plurality of links 21. An arc-shaped recess is formed between the connection conductor 20 and the pressing plate 22, and the insertion hole 24 of the conductor exposed portion 3 is configured by the two recesses. The diameter of the insertion hole 24 increases with respect to the insertion of the conductor exposed portion 3 of the electric wire 1, but decreases with respect to the pulling direction of the conductor exposed portion 3. As in FIG. 3, a locking pin 19 a and a nut 19 b are provided at the distal end portion of the presser plate 22 to prevent the conductor exposed portion 3 from coming off.

  5 includes a sleeve main body 25 having an insertion hole 27 into which the covered electric wire 1 and the holding plate 26 of the electric wire 1 can be inserted. While the presser member 12 is screwed, a needle electrode 28 is provided at a position facing the presser member 12. Then, the electric wire 1 is compressed by the holding member 12 through the holding plate 26, and the needle electrode 28 is passed through the electric wire 1 from the opposite side.

  The wire connection sleeve of FIG. 6 includes an inner cylindrical body 31 having a through hole 32 that is greatly opened toward the opening end, a conical chuck 33 inserted in the through hole 32, and an end portion of the conductor exposed portion 3. Are connected to the inner cylinder 31 and an outer cylinder 35 having substantially the same configuration as the inner cylinder 31, and the sleeve body 30 is formed by the inner cylinder 31 and the outer cylinder 35. It is configured. The conductor exposed portion 3 is compressed and connected through the chuck 33 by screwing the inner cylinder body 31 and the outer cylinder body 35.

  The electric wire connection sleeve of FIG. 7 includes a substantially columnar connection conductor 40 and a bottomed cylindrical cap 41 that is screwed to both ends of the connection conductor 40. The connection conductor 40 is formed with an insertion hole 42 whose diameter increases toward the opening end, and a conical chuck 43 is press-fitted into the insertion hole 42. Further, an internal hole 45 is formed in communication with the insertion hole 42, and a spacer 46 is inserted into the internal hole 45. The diameter of the open end of the internal hole 45 is smaller than the closed end of the insertion hole 42, and the length from the open end of the insert hole 42 to the closed end of the internal hole 45 is located at the center of the connection conductor 40. The holding member 12 compresses the distal end portion of the conductor exposed portion 3 via the spacer 46, and the cap 41 presses the chuck 43 to compress the proximal end portion of the conductor exposed portion 3.

  The wire connection sleeve of FIG. 8 is an improvement of the pantograph of FIG. 4, and the same reference numerals indicate the same or corresponding ones. The difference from the wire connection sleeve of FIG. 4 is that the prismatic connection conductor 50 is substantially S-shaped. It is deformed into a shape, and the base end portion (straight portion) of the L-shaped detent pin 51 is rotatably supported at the center of the connection conductor 50, and the distal end portion (folded portion) of the detent pin 51 is connected. This is a point provided so as to be positioned between the end face of the center portion of the conductor 50 and the end face of the holding plate 22, and the detent pin 51 prevents the holding plate 22 from moving in the diameter increasing direction, that is, insertion of the electric wire 1. In both cases, the tension is reduced and the compression force is strengthened.

  In the case of the above-described embodiment, the pressing member 12 does not need to be screwed in a line in the axial direction of the sleeve body, and may be screwed in a radially outward direction (radially). Moreover, the insertion direction of each electric wire 1 to be connected is not limited to the illustration.

It is a figure which shows the electric wire connection sleeve which concerns on Embodiment 1 of this invention. It is a side view of FIG. It is a figure which shows the modification 1 of the wire connection sleeve of this invention. It is a figure which shows the modification 2 of the wire connection sleeve of this invention. It is a figure which shows the modification 3 of the wire connection sleeve of this invention. It is a figure which shows the modification 4 of the electric wire connection sleeve of this invention. It is a figure which shows the modification 5 of the wire connection sleeve of this invention. It is a figure which shows the modification 6 of the wire connection sleeve of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Electric wire, 2 ... Coating | cover, 3 ... Conductor exposure part, 4, 46 ... Spacer 10, 16, 23, 25, 30 ... Sleeve main body, 11, 17, 24, 27, 42 ... Insertion hole, 12 ... Holding member (Bolts), 15, 20, 34, 40, 50 ... connecting conductor, 18 ... wedge, 19a ... locking pin, 19b ... nut, 21 ... link, 22, 26 ... presser plate, 28 ... needle electrode, 31 ... inside Cylindrical body, 32 ... through hole, 33 ... chuck, 35 ... outer cylindrical body, 41 ... cap, 43 ... chuck, 45 ... internal hole, 51 ... detent pin

Claims (4)

  A spacer (4) inserted through a part of the conductor exposed portion (3) of the electric wire (1) from which the coating (2) has been peeled off, and each conductor exposed portion (3) through which the spacer (4) is inserted are inserted. And a sleeve body (10) having an insertion hole (11), and a plurality of pressing members (12) are screwed onto the peripheral surface of the sleeve body (10), and the sleeve body (10) The wire connection sleeve is characterized in that the end of each pressing member (12) protrudes into a position where it abuts against the conductor exposed portion (3) and the spacer (4).   The wire connection sleeve according to claim 1, wherein the spacer (4) is located on the base end side of the conductor exposed portion (3).   The insertion hole (11) of the sleeve main body (10) is formed on the sleeve main body (10) so that the distance until the tip of the pressing member (12) contacts the spacer (4) and the conductor exposed portion (3) can be increased. The electric wire connection sleeve according to claim 1, wherein the electric wire connection sleeve is formed eccentrically with respect to a center.   The electric wire connection method using the electric wire connection sleeve in any one of Claims 1 thru | or 3.

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